JPH0240393B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is a method for sorting large grains by moving grains such as rice and wheat in a cylindrical sorting tube installed upright in a shell. This invention relates to a vertical grain sorter that separates grains and small waste grains.

Prior Art The overall structure of a vertical granule sorter is disclosed in Japanese Patent Application Laid-Open No. 57-159583 filed and published by the applicant, and Japanese Patent Application Laid-Open No.
This method is known from Japanese Patent Application Laid-Open No. 58-27676 and Japanese Patent Application Laid-open No. 58-27677.

The sorting section of this vertical granule sorter is constructed by fitting a winged shaft with wing-like bodies spirally arranged around the cylindrical body into a cylindrical sorting tube set upright. The particles are sorted by being slid up by the rotation of the wing-like bodies and pressed against the inner circumferential surface of the sorting cylinder by centrifugal force. As a means to improve the sorting rate, the above-mentioned Japanese Patent Application Laid-Open No. 58-27677 discloses that the entire surface of the wing-shaped body is tilted downward in the radial direction,
Make sure that the granules do not rise too quickly and that many of the granules come into sliding contact with the inner circumferential surface of the sorting cylinder.
Patent Application No. 57-37659 (Japanese Unexamined Patent Publication No. 58-1983) has already been filed.
No. 153562), the dynamic frictional resistance of the upper surface of the wing is greater than that of the flat metal plate, thereby providing resistance to the particles sliding on the upper surface of the wing, preventing the particles from rising too quickly, and preventing the particles from rising too quickly while being agitated. I'm trying to rise.

Problems to be Solved by the Invention With the above configuration, when the number of particles supplied to the sorting cylinder increases and the particles accumulate from the inside to the entire outer circumference of the upper surface of the wing-shaped body, the former wing-shaped body In the configuration in which the entire surface is sloped downward, the amount of granules that come into sliding contact with the inner peripheral surface of the sorting tube 1 does not increase even though the amount of granules supplied increases, and the latter configuration increases the dynamic frictional resistance on the upper surface of the wing-like body. In this case, the upper layer of particles accumulated on the upper surface of the wing-shaped body does not receive sufficient agitation action, and the sorting rate decreases rapidly.

Therefore, when the amount of granules is small, the sorting rate is very good, but when the amount is large, the sorting rate rapidly decreases and the variation in the sorting rate becomes large.

The present invention aims to prevent the sorting rate from changing much even if the amount of granules supplied to the sorting cylinder varies greatly.

Means to solve problems Therefore, the present invention is configured as follows.

That is, in a vertical granule sorter in which a winged shaft 2 having wing-like bodies 3 spirally provided around a cylindrical body 24 is fitted into an upright cylindrical sorting tube 1,
At least at a position corresponding to the range in which the sorting hole 4 of the sorting tube 1 is provided, the upper surface of the wing-like body 3 is inclined downwardly on the inner side in the radial direction, and is made horizontal on the outer peripheral part.

Effect of the invention With the above configuration, the amount of grains to be processed is small and the wing-shaped body 3
In a state where particles accumulate only on the horizontal surface of the outer periphery,
The grains have a good lifting effect and quickly rise inside the sorting cylinder 1, but since there are few grains, they are well sorted. In addition, when the amount of particles to be processed is large enough to accumulate on the entire surface of the wing-shaped body 3 from the inside to the outer periphery, in addition to the centrifugal force caused by the rotation of the winged shaft 2, it is also caused by the sliding action of the inner downward slope surface. As a result, the stirring action in which the inner grains and the outer peripheral grains are exchanged is promoted, and the sorting is performed well, resulting in a sorting rate that is approximately the same as when there are fewer grains.

Effects of the Invention Therefore, there is little variation in the sorting rate depending on the amount of particles supplied to the sorting cylinder 1, and a substantially constant sorting rate can be maintained.

Embodiment Next, the structure of an embodiment of the present invention will be described with reference to the drawings.

The overall structure of the vertical granule sorter is as shown in FIG. 1, in which a cylindrical sorting tube 1 with a number of sorting holes 4 is rotatably placed inside a square cylindrical shell 5. A winged shaft 2, on which a wing-like body 3 is spirally provided, is rotatably fitted into the sorting tube 1. A supply chute 6 is provided protruding from the lower side of the shell 5 to supply the particles from outside the shell 5 into the sorting tube 1.
A tank 7 for storing sorted particles is protruded from the upper side.

The inside of the shell 5 extends from the bottom to the top, and includes a driving area 10 partitioned by a bottom plate 8 and a base 9, a supply area 12 partitioned by a base 9 and a lower gutter 11, and a lower gutter 11.
A sieving area 14 partitioned by an upper receiving gutter 13 and an upper receiving gutter 1
3 and a take-out area 16 partitioned by a canopy 15.

On the base 9, a grain receiving cylinder 17 communicating with the supply chute 6 is installed, and on this grain receiving cylinder 17 is a cylindrical sorting cylinder passing through the supply area 12, the sieving area 14, and the take-out area 16. 1 is installed rotatably. Also,
A winged shaft 2 that penetrates the grain receiving tube 17 and the sorting tube 1 and performs a grain elevating action is rotatably set up on the base plate 9.

The sorting tube 1 has a large number of sorting holes 4 bored in the circumferential wall at the upper and lower middle portions, and a wide-opening discharge window 18 bored in the circumferential wall at the upper end. Emission window 1 of this sorting tube 1
On the lower side of 8 is an upper circumferential eave 19 that extends over the upper gutter 13.
A lower receiving gutter 1 is provided below the drilling range of the screening hole 4.
A lower circumferential eave 20 extending upward is provided. Also,
A plurality of blades 21 and 22 are fixed to the upper circumferential eaves 19 and the lower circumferential eaves 20, respectively, for scraping out the grain size and waste grains accumulated on the upper receiving gutter 13 and the lower receiving gutter 11.

The upper receiving gutter 13 is formed into an annular concave groove by the inner and outer vertical walls surrounding the sorting tube 1. The outer vertical wall on the tank 7 side is cut out, and the water is discharged from the discharge window 18 of the sorting tube 1 into the upper receiving gutter 13. The sized grains that accumulate on the top are scraped into the tank 7 by the scraper blades 21.

The lower receiving gutter 11 is formed in the same annular groove as the upper receiving gutter 13, and a part of its outer groove is communicated with the outside of the shell body 5 through the waste grain outlet 23, and from the sorting hole 4 of the sorting cylinder 1. The leaking small-diameter waste particles are received and taken out from the shell body 5 through a waste particle outlet 23 by a scraper blade 22.

The winged shaft 2 has a cylindrical body 24 close to the inner diameter of the sorting cylinder 1.
A wing-like body 3 is fixed in a spiral manner to the holder, and the area corresponding to the area in which the sorting hole 4 of the sorting tube 1 is formed is constructed as shown in FIG. 2 or 3.
Fig. 2 shows the wing-like body 3 folded into multiple stages, which are tilted downward so that the inclination angle with respect to the radial direction gradually decreases from the inside to the outside, and becomes horizontal at the outer periphery. There is. In FIG. 3, the upper surface of the wing-like body 3 is a smoothly curved surface, which slopes downward so that the inclination angle with respect to the radial direction gradually decreases from the inside toward the horizontal surface of the outer circumference.

A driving region 10 within the shell 5 is provided with a gear box 27 and a motor 28 for rotating the sorting tube 1 and the winged shaft 2 in opposite directions.

The shutter 3 is located at the outlet 29 at the bottom of the tank 7.
0 is provided, and the shutter 30 is opened and closed as appropriate to pack the sorted particles into bags.

Next, the sorting action in the particle sorting cylinder 1 will be explained as follows.

The granules supplied from the supply chute 6 to the granule receiving tube 17 are lifted while sliding on the wing-shaped bodies 3 by the rotation of the winged shaft 2 . Then, the sorting hole 4 of the sorting tube 1
In the area where the granules are perforated, the granules slide outward on the downwardly sloped surface inside the wing-like body 3 and the centrifugal force due to the rotation is applied to the granules, which are well stirred and come into sliding contact with the inner circumferential surface of the sorting tube 1 to be sorted. , small-diameter waste particles are sieved out to the sieving area 14, and large-diameter regular particles are discharged from the discharge window 18 to the take-out area 16. Further, the waste grains are taken out of the shell body 5 from the waste grain outlet 23, and the sized grains are stored in the tank 7.

Here, the sorting action of the sorting tube and winged shaft was explained using an example of a method in which particles are sorted while being sent up in the sorting tube, but conversely, in a method in which particles are sorted while being sent down in the sorting tube. The present invention is also effective.

[Brief explanation of drawings]

The figures show an embodiment of the present invention; FIG. 1 is an overall front sectional view, FIG. 2 is a partially enlarged front sectional view,
FIG. 3 is a partially enlarged front sectional view showing another embodiment. 1... Sorting tube, 2... Winged shaft, 3... Winged body,
4... Sorting hole, 24... Cylindrical body.

Claims (1)

[Claims] 1 In a vertical granule sorter in which a winged shaft 2 having a winged body 3 spirally provided around a cylindrical body 24 is fitted into an upright cylindrical sorting tube 1, at least the sorting of the sorting tube 1 is performed. A vertical granule sorter characterized in that the upper surface of the wing-shaped body 3 is inclined downwardly on the inner side toward the radial direction at a position corresponding to the area where the holes 4 are provided, and is made horizontal on the outer periphery.